Daewoo
Door Switch / Monitor Switch Miswiring or Failure
Microwave light, fan, and turntable come on as soon as the door is closed, without pressing START
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Stuck primary door switch, Miswired door switch after previous repair, Shorted control relay on PCB, Bent door latch actuating switches incorrectly
How to Fix / Troubleshooting
Safety first: Unplug the microwave immediately. This is a serious safety issue related to the door interlock system.
Step-by-step checks:
- 1. Do not use the microwave: Operating in this condition can be dangerous. Keep it unplugged until repaired.
- 2. Inspect door latch: Check for visible damage or misalignment of the latch hooks.
- 3. Access door switches: Remove the cabinet and inspect the door switch assembly. Verify that each switch is wired according to the Daewoo wiring diagram. Correct any miswiring.
- 4. Test switches: Use a multimeter to test each switch for proper open/closed operation. Replace any switch that is stuck closed.
- 5. Check control relay: If switches are correct, the control board's power relay may be welded closed and require PCB replacement.
Recommendation: Due to the safety implications, have a qualified technician verify the repair.
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Repair Difficulty
Professional Required
5/5
Required Part
Door Switch Assembly
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